Machine for making and sharpening rock-drills and for general forging.



0. BROWN. MACHINE FOR. MAKING AND SHARPENING ROCK DRILLS AND FOR GENERALFORGING. APPLICATION FILED AUG. 2, 1909.

1,098,474, Patented June 2, 1914,

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COLUMBIA PLANOORAPH CD.,WASIHNUTON, 1:. cv

0. BROWN. MACHINE FOR MAKING AND SHARPENING ROCK DRILLS AND FOR GENERALFORGING.

' APPLICATION FILED AUG. 2, 1909.

1,098,474, A Patented June 2, 1914..

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INVENTOR. CARY. BRO/40V,

0. BROWN. MACHINE FOR MAKING AND SHARPENING ROCK DRILLSAND FOR GENERALFORGING.

' APPLICATION FILED AUG.2, 1909. 1,098,474.

Patented June 2, 1914.

3 SHEETS-SHEET 3.

l IN VEN TOR.

Ti I 62/1 4 flea/m; w BY Fl ATTORNEY.

UNITED STATES CARL BROWN, 01? DENVER, COLORADO,

PATENT OFFICE.

ASSIGNO-R TO THE CHAMPION FORGING MACHINE COMPANY, A CORPORATION OFCOLORADO.

MACHINE FOR. MAKING AND SHARPENING ROCK-DBILLS AND FOR GENERAL FORGING.

To all whom may concern Be it known that I, CARL Brown, a citizen of theUnited States, residing in the city and county of Denver and State ofColorado, have invented new and useful Improvements in Machines forMaking and Sharpening Rock-Drills and for General Forging, of which thefollowing, together with the accompanying drawings, consti' tutes afull, clear, and exact specification.

This invention relates to that class of machines in which dies or othertools are mounted in a suitable framework with means for operating saidtools, and adapted to form the drill-bits or simply drills used in rockdrilling and for other forges for which it is adaptable.

The object of my invention is to provide simple, and efficient means foreliminating skilled hand work in the making of new drills and in thesharpening of used drills; also, to provide means for doing a variety ofgeneral forging which is in constant demand around a mine or quarry. Inattaining the object mentioned a separate tool is provided for eachsuccessive step in the forming of the drills, and these tools aremounted in a rotatable carrier which is here inafter referred to as thetool wheel.

The tool wheel is placed at an angle, preferably a right angle, with theline of action of the hammer and is rotatably pivoted on a shaft, thetools being centered on a circular line around the wheel axis andconcentric with it, so that they may be revolved around this axis and bebrought consecutively into position between a suitable hammer and ananvil, the latter being heavy enough to absorbthe force of the blowsstruck by the hammer.

The hammer and anvil are preferably mounted on the same framework withthe tool wheel, which latter is rotated by hand and when the desiredtool is in alinement with the hammer and the anvil, the wheel is lockedin position, leaving the tool ready for operation.

In the drawings, Figures 1, 2 and 8, are respectively, plan, front,elevation and end elevation of the entire machine. Fig. 1 is a section011 line M, Fig. 2, and Fig. 5, is a perspective detail view showing amodilication of a minor part of the machine. Figs. 6 and 7 are enlargeddetail views of one particular set of dies, Fig. 6 being partlySpecification of Letters Patent.

Application filed August 2, 1909.

Patented June 2, 1914.

Serial No. 510,950.

in section on line 6-6, Fig. 7, and Fig. 7 being partly in section online 7-7, Fig. 6. Figs. 8, 9, 9 10, 11 and 12 are enlarged perspectivedetail views, showing the operations of, and methods of using, some ofthe tools.

In all the different figures the same parts are designated by the samereference charactors.

The machine consists of the frame (1), upon which is mounted theoverhanging shaft (2), the latter pivotally supporting the tool wheel(3*), which is made up of the circular disks and (8), connected to eachother by cross bolts (41) passing through separators l Eleven differenttools are shown mounted in (3*), which comprise the following: (12 (12cut ting 01f dies; (18) (13 splitting dies; (14?) (la opening dies; (15)(15 gaging dies; (16 (16 bevel-cutting dies; (17) (17 sharpening dies;(18) (18 swage dies; (19), a dolly; (20) (20"), spoon dies; (21), astraight face an yil; and (22), an anvil with beveledoffset "ace.

Those tools which consist principally of two parts a relativelystationary one, and a relatively movable one, I choose to refer to asdies. The stationary parts of the dies are fastened in sleeves (3extending outward from (3 while the movable parts have a limitedreciprocating sliding motion in sleeves (3 extending outward from (3).On the frame (1), to one side of the tool wheel, is the hammer (5),sliding in guides (5 and adapted to be reciprocated by any suitablemeans, but preferably by steam or air acting upon a piston in thecylinder (6), the latter being fitted with the usual inlet and exhaustpipes, (not shown). On the opposite side of the tool wheel, and in linewith (5) is an abutment block (7), carrying the movable anvil (9).Abutment block (7 is bolted to frame (1) and notches (3 are cut in theperiphery of (3) to engage the stop (8), when the corresponding tool iscentered in working position between (5) and (9), and (8) is preventedfrom slipping out accidentally by pin (8). Block (7 ),is preferably madeof cast iron and has extending length wise across its front face, arecess (7 the use of which will presently be made clear.

'A dovetailed groove (7 extends across that side face of (7), nearestengaging a corresponding dovetail (7), on the anvil (9). By means of thelever (10), and link (10), may be pushed back, clear of the recess (7),the purpose of which will appear hereinafter. Dotted lines in Figs. 1and show the position of (9), (10) and (10 when (9) is pushed back asabove stated. The link (10), is forked at each end, one end beingpivoted to (10), while the other end straddles and is pivotallyconnected to, an eye-bolt (9), fastened in the bottom of (9).

All the tools used in this machine excepting the aging dies (15),bevel-cutting dies (16) (16 and the sharpening dies (17) (17), as wellas a part of the splitting dies (13) (13), are in everyday use byblacksmiths, in some form or another, and they constitute a part of thepresent invention only so far as their means of operation is concerned.a

The gaging dies, bevel-cutting dies and sharpening dies are entirelynew, but as each one forms the subject of a separate application forUnited States patent, all bearing even date herewith, the reader isreferred to those applications for detailed descriptions thereof. Thegeneral mode of construction is the same in all the remaining dies, thedifferences being in the sizes and shapes of the working face;therefore, the detail sections (Figs. 6 and 7) of the cutting-off dieswill suflice to illustrate the operating mechanism of the swage dies,the splitting dies, the opening dies and of the spoon dies. The lastfour dies named above, have their working faces illustrated,respectively, in Figs. 8, 9, 10 and 12. These figures show in dottedlines the foremost and rearmost position, as the case may be, of themovable parts of the dies.

Referring to Figs. 6 and 7 which show (12), in the closed and openpositions respectively, (12 is the stationary part of the cutting diesand is held in the sleeve (3), by the bolt (12). The movable part (12),slides in sleeve (3), and is arranged to be driven forward against thework and toward the opposite die by blows from the hammer (5). Thespring (12), acting between the bolt (3 and pin (12), retracts (12) whenthe pressure thereon, exerted by (5), is withdrawn. (12) has its motionin the barrel (12), and (12) is slotted longitudinally at (12), to clear(3). Bolt (3 forms a stop for (12) against the rearward pressure exertedby (12). In Fig. 6, (23), shows a bar inthe position occupied when beingoperated upon.

In using any of the dies they are first positioned between (5) and (9);the steel, which has previously been heated to the required temperature,is inserted from the I front of the machine, as shown by the dottedoosen lines at (23) Fig. 1, the dies acting upon the steel sidewise. Theoperator has hold of the end of the steel projecting outside themachine, and the hammer (5), is then given the desired motion by thesteam or air in the cylinder (6), controlled by valves with leverconnections (not shown) brought within easy reach of the operator afterthe manner customary on ordinary steam ham mers. In this way it ispossible to strike heavy or light blows, many or few, upon the movableparts of the dies, according to the judgment of the operator.

In making a new drill, after the steel has been cut to the requiredlength by the cutting-0d dies, (see Figs. 1, 6 and 7), one end isinserted in the swage dies, to form the shank; the steel is then placedin the bed of the machine in the position as shown by the broken line(24), Figs. 1 and 2, with its shank inserted in the hole (25) in thetail block which latter is adjustable along the ratchet rail (26) fordifierent lengths of drills, by means of a pawl (27), the steelextending through recess (7) in abutment block ('5), (the anvil havingbeen pushed back) and through the slots (28) and (28 in the tool wheel(3*), the latter having first been swung into the proper position, sothat the steel can be upset on the end opposite to the shank, by blowsfrom Fig. 5 shows another device for adjusting the position of the tailblock along the ratchet rail; (29), being a bail suitably pivoted on(25) and adapted to engage suitably formed notches in ratchet rail (26After the steel has been upset, the beveledofiset anvil is used toproperly shape the upset end to a uniform inverted taper. As shown inFig. 11, (23), is a part of the steel resting with its end in thebeveled-offset of (22) and in position to receive blows directly fromthe hammer (5), dotted lines indicating the path traveled by the latter.The straight face (22) Fig. 11, forms a stop for (5), and by slowlyturning the steel in this position, its end is formed into an invertedcone having a more or less regular, circular, cross-section at everypoint. By gradually pulling the steel out of the beveled-ofiset in thedirection indicated by arrow (23), and by continuing to turn it, theoperator may forge it down to any required size. Next, the splittingdies are used to cut longitudinal slits along elements of the cone, asshown in Figs. 9 and 9*. Referring to these latter figures and to Fig.3, (30), is a movable aw having a Vshaped opening across its face andworking in guides (31), disposed in the tool wheel, between (3) and (3Jaw (80) holds the end of the steel positively while it is beingoperated upon by cutters (13) and (13 at the same time causing the steelto be centered with the plane of action of the two cutters, andfurthermore, preventing the steel from glancing out from between thecutters when these first contact the steel. A spring (32), undercompression between the wheel shaft (2), and the said jaw, normallypresses the latter against the stops (30 The steel of which the drill isbeing made is pushed into (30), Fi 9, by the operator and is thus heldsecurely, while the hammer Figs.

(1) and (2) ,is allowed to strike (1.3),which forces the steel sidewiseagainst (13 thus simultaneously cutting a slit 011 each of two oppositesides of the steel. The steel is then turned through right angle and twomore slits are cut in the same manner. Fig. 9 shows the steel. insection after all four slits have been cut, and before (13) has beenretracted. (18 and (13 may be of varying widths suited to the work, butwhen not wide enough to reach as far up on the cone as it may berequired to cut the slits, then the steel is pushed more stronglyagainst (30), the latter receding against (32), and the slit-cuttingoperation repeated.

From the splitting dies the bar is put into the opening dies, whichlatter simply spread open farther the longitudinal V-shaped slits madeby the splitting dies and leaves the cross-section of "the drill, nearthe point, in the form of a Maltese cross. In Fig. 10 is shown, insection, a part of the steel after having been operated upon by theopening dies andbefore (14) has been retracted. The gaging dies are thenused to flatten out the wings thus formed on the steel and at the sametime to gage the thickness of the wings and the amount of their spread.The next step is the cutting of the bevels on the face of the drill, toform chisel edges. This is accomplished in the bevelcutting dies, whichusually leave the drill in a finished condition. Should there, however,be any roughness or burs left on the drill, these may be taken off bysliding the tail block farther back on the rail (26), so that the faceof the drill, when again placed in the bed of the machine, will comejust adjacent to the face of the dolly (19), which with a few light tapsfrom (5) finishes the drill.

The dolly is loosely held in the tool wheel by having its shank passthrough corre sponding openings in (3) and (3 which are slightly largerthan the cross-section of the shank of the dolly, thus allowing thedolly free longitudinal movement, so that it can be accommodated tosmall variations in lengths of the drills operated upon.

The sharpening of used drills is explained in the application for U. S.patent on sharpening dies for rock drills already referred to.

Fig. 12 shows the method of forming spoons, (33) representing thesection of one of the latter while in the dies.

l ft will be noticed that in this machine the steel can be shaped byseparate ha1nmerlike blows; that all the tools are at all times inperfect adjustment and ready for instant use, needing only a movement ofthe tool wheel to bring them into the working position; that there isonly one ope 'ating cylinder for use on all the tools; and that thenumber of individual tools provided, is suilicient for all the steps inmaking or sharpening drills, thereby rendering any skilled hand workunnecessary.

l l hile drills of any shape may be made in this machine, the tools itcontains are de signed with special reference to making those drillswhose cross-section at and near the point is the well known cruciform.

Tn constructing this machine the parts must be so arranged that thereshall not be too much clearance between the tools and the anvil (9) asit is intended that the force of the blows from the hammer shall betransmitted through the tools and work and be taken up finally bv theinertia of the abutment block (7), without throwing an undue strain uponthe structure of the tool wheel nor upon the shaft carrying it. Toreduce the vibration, in operating the machine, a Cam (3%) is provided,which is fixed on one end of a stub shaft (35), the latter having ahandle (36) attached to its other end and located within easy reach ofthe operator. By means of the said cam working against the disk (8), anytool which may be in the proper position, can be clamped tightly againstthe anvil (9), and held there securely by a ratchet (37) adapted toengage the handle (36). Normally there is suflicient play between thewheel journal and the shaft to obviate any undue strain, so long; as theclearance above referred to, is not too great.

laving fully described my invention, what I claim new, is

1. In a drill-forging and sharpening machine, the combination withasuitable framework, of a pivotally mounted wheel, with forging tools,concentrically mounted in the said too]. wheel, with a power hammerplaced upon one side of the planes of the tool wheel, and an anvilplaced upon the opposite side of the planes of the said tool wheel, thecombination being so arranged that any tool carried by the said toolwheel, may be brought with its line of action directly between and inalinelnent with the said power hammer and the said anvil, substantiallyas described.

2. In a drill forging and sharpening machine, the combination with asuitable framework, of a power hammer with an alined anvil, a tool wheelcarried on a shaft, the shaft paralleling the line of action of thepower hammer, with suitable tools mounted in the tool wheel,concentrically therewith,

the tool wheel being adapted to be rotated and bring consecutively eachtool into an alined position with the said power hammer, and the saidanvil, substantially as de scribed.

3. In a drill sharpening and forging machine, the combination withasuitable framework, of a tool wheel mounted on a shaft, with its axisapproximately parallel to a bed arranged in the said framework, with apower hammer and an anvil in alinement with each other, both suitablymounted on the said bed and disposed on either side of the planes of thetool wheel, with tools having their lines of action generallyperpendicular to the planes of the said tool wheel and adapted to bebrought into alinement with and between the said power hammer and theanvil, and means for locking the tool wheel in position when any desiredtool is in alinement with the power hammer and anvil, as specified.

4c. In a machine of the class described, a: j ournaled tool-wheel, toolssuitably disposed around the axis of the tool-wheel, the lines. ofaction of the said tools being approxi-' mately parallel to the saidtool-wheel axis;

a striking mechanism disposed on one side of the planes of thetool-wheel, with an anvil disposed on the opposite side of the saidtool-wheel planes, and so placed that any or" the tools may be operablypositioned between the said striking mechanism and the said anvil,substantially as described.

5. The combination with a ournaled wheel, of a plurality of suitabletools operably disposed in, and axially alined with, the said wheel, andmeans for operating the said tools.

6. The combination with a journaled wheel, of a plurality of suitabletools operably disposed in and axially paralleling the axis of the saidwheel, means for operating any of the said tools at one side of thewheel, and a co acting abutment opposite said means at the opposite sideof the wheel.

In testimony whereof, I have signedmy name to this specification in thepresence of two subscribing witnesses.

CARL BROWN.

Witnesses P. H. MALLiNoKRoDT, IDA B. HAWLEY.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

